Foreground Data


Product Name
Rhodes/HartRAO 2326 MHz Continuum Map
Coord. System
Projection Type
HEALPix, ring, res 8 (Nside=256)
20 arcmin
Original Data Source


Jonas et al. (1998) used the Hartebeesthoek Radio Astronomy Observatory (HartRAO) telescope to map 67% of the sky at 2326 MHz with an angular resolution (HPBW) of 20 arcminutes and rms pointing accuracy of 1.2 arcminute. All survey observations were made in linear polarization (E-vector east-west). The sky region covered is -83 < dec < 13 for 0 h < RA < 12 h and -83 < dec < 32 for 12 h < RA < 24 h. They estimated that the uncertainty in the temperature scale is less than 5 per cent, and that the error in the absolute zero level is better than 80 mK TFB in any direction.

Platania et al. (2003) applied a destriping algorithm to the portion of the map at dec < 13, and produced Cartesian and HEALPix versions of the original map and the destriped map. All of the maps are available from CDS. LAMBDA hosts copies of the HEALPix maps obtained from CDS.

In March 2020, LAMBDA produced new versions of the data files with minor corrections and additions to the FITS headers to comply with FITS standards and to allow for the files to be read with the healpy Python package. The filenames for these versions include a prefix of 'lambda_'.

More details can be found in:

"The Rhodes/HartRAO 2326 MHz Continuum Survey", Jonas, J.L., Baart, E.E., and Nicholson, G.D. 1998, MNRAS, 297, 977, ADS

"Full sky study of diffuse Galactic emission at decimeter wavelengths", Platania, P., et al. 2003, A&A, 410, 847, ADS

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